UNIX
Why Linux?
Because of its networking and multiuser features
Why in so common using Unix and Java?
The wheel Group
The wheel group is a group which limits the number of people who are
able to su to root.
The basic set up, as it was in the beginning, was to do the following:
- Create a “wheel” group in /etc/groups
- Change the permissions of the “su” command so that only those in the “wheel” group may run it.
Software location
Usually we can have 2 optins:- /usr/bin is where launchers are kept.
- /usr/lib/chromium-browser is where all the binaries and data required for use by a program is kept -- that can essentially be considered where a program is really installed.
- /usr/share is where the Application entry, and where the `man' entries are kept for a program.
or
- some installations is installed in /opt instead, rather than in the various directories in /usr